Eva's references from the Devil May Cry animated series:

She was first referred by Patty. In the beginning, Patty thought that Eva was Dante’s girlfriend and that Eva was regularly attending on Dante’s “shows”, which Patty wasn’t allowed to watch because she was young. “ So the woman in that picture is coming to your show, then huh?” Later Patty said that her mother was prettier than Dante’s “girlfriend”.

Later on in the series, Dante comes across a demon named Brad and he knows that Dante is a half-breed “ born from the union of a human and a demon” and he asked if Dante’s parents were in love and Dante replies to him with “ Who knows? You always hear stories about the lovers, they look like they were meant for each other, but in their hearts are cold as ice — But I think a lot of those couples truly loved each other deeply inside their hearts” proving that Dante’s parents were deeply in love when they were still alive and together.

Then we see an old lady, later in the series, Mrs. Margaret. She stated to Dante that his mother had some difficult times when Dante was still young, she was going through depression and suffering. Later on the episode, we see that the demon who attacked Sparda’s family wanted Dante’s blood, Sparda’s blood.